Nonsiphon shampoo spray head



Nov. 27, v194s. N M YHEW I 2,389,676

NONSIPHON SHAMPOO SPRAY-HEAD Filed Nov. 4, 1944 INVENTOR. N M AYH E wJAMES ATTOR NEYS Patented Nov. 27, 1945 UNITED STATES PATENT OFFICENONSIPHON SHAMPOO SPRAY HEAD James N. Mayhew, Los Angeles, Calif.Application November 4, 1944; Serial No. 561,978

4 Claims.

The present invention relates to improvements in a non-siphon shampoospray-head, and it consists of the combinations, constructions andarrangements hereinafter described and claimed.

An object of my invention is to provide a nonsiphon shampoo spray-headin which the water contained in the hose leading from the spray head upto the Water pipe is retained in the hose so that a subsequent turningon of the water will cause the water to issue initially from thespray-head rather than a combination of ai and water. In the usualshampooing spray-head apparatus when the water is turned off a siphonaction will take place to remove all of the water from the .hose. If nowthe Water is turned on again the air will be ejected from the sprayheadwith the water and a series of sputterings of alternate ejections of airand water Will ensue until the entire hose is again filled with water.This is annoying to the person Whose head is being sprayed with waterand frequently the force of the combined air and water is sufficient tosplatter the water out of the basin and onto the clothes of the personand the attendant. My device prevents the siphoning of wate from thehose and therefore no air will be mixed with the water during theinitial use of the device.

A further object of my invention is to provide a device of the typedescribed which is extremely simple in construction and which isautomatic in operation. A spring-pressed valve is used and will openunder' the water pressure for permitting water to pass through the hosewhen the water is turned on, but as soon as the water is turned 01f thevalve will instantly close and will retain the water in the hose. Thedevice also has novel means for concaving the perforated diaphragm fordirecting the water in a coneshape and thus concentrate the water on thepersons head.

Other objects and advantages will appear in the following specification,and. the novel features of the device will be particularly pointed outin the appended claims.

My invention is illustrated in the accompanying drawing forming a partof this application, in which:

Figure 1 is a vertical section through the device, portions being shownin elevation;

Figure 2 shows two parts of the device; and

Figure 3 is a diagrammatic showing of the device operatively connectedto a water outlet.

While I have shown only the preferred form of my invention, it should beunderstood that various changes or modifications may be made within thescope of the appended claims without departing from the spirit and scopeof the invention.

In carrying out my invention I provide a hose indicated generally at Aand this hose extends from the spray-head B to an outlet pipe C, seeFigure 3. The outlet pipe communicates with the hot and cold waterValves l and 2 so that a turning on of either or both valves will causewater at the desired temperature to flow up- Wardly through the pipe Cand enter the hose A through a connection 3. The water then flows downto the spray-head B which will now be described in detail.

An expander sleeve 4 is mounted in the end of the hose A and a ferrule 5is slipped over the outer end ofthe hose. The ferrule 5 has areinforcing annular rib 6 that acts as a stop for a sprayhead casing l,which is preferably cup-shaped in cross section and has a bent backportion 8 to provide a rim or head for the casing. The top of the casing1 has a flanged end 9 that frictionally engages with the portion ll] ofthe ferrule 5 extending below the rib 6. Figure 2 shows the interior ofthe portion I0 threaded at H.

A thimble [2 has an exteriorly threaded portion l3- adapted to bescrewed into the portion II for adjustably connecting the thimble to theferrule. The thimble has a plurality of openings M in its cylindricalwall through which water may pass. A shoulder 15 is provided near thelower closed end of the thimble and a cylindrical screen l6 placed inthe thimble rests on the shoulder. The thimble has a head I! with acylindrical wall I8.

A spring valve is slidably mounted in the screen and it comprises arubber seat I9 secured to a metal base 20 by a screw 2| or othersuitable fastening means. A coil spring 22 bears against the base 20 andthe lower end of the spring is received within the head IT. The springis strong enough to keep the seat l9 resting against a valve seat 23formed at the lower end of the sleeve 4 and the force of th spring issufficient to hold the volume of water that remains in the hose A afterthe valves l and 2 are closed. The spring 22 will compress from thewater' pressure as soon as the water is turned on and will movedownwardly to permit the water to flow from the hose A. The wate willpass through the small openings in the screen and through the thimbleopenings l4 into the interior of the casing I.

A perforated diaphragm 24 has its outer rim formed into a flange 25 thathas a press fit with the cylindrical wall 26 of the casing. Thediaphragm has a central opening 21 for receiving the head I I and aflange 28 rimming the opening has a force fit with the wall I8 of thehead. It will be seen that an adjustment of the thimble l2 with respectto the ferrule will cause the diaphragm to flex and it is possible tomake the diaphragm concave so that water issuing from the openings 29 inthe diaphragm will be directed into a cone for concentrating the wateron the persons head.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood.

Durin the flow of water through the device,

the water pressure will keep the valve [9 un-' seated. The openings 30in the screen l6 are smaller than the openings 29 in the diaphragm 24 sothat any foreign matter'passi'ngthrough the openings 30 will passthrough the openings 29. No clogging of the casing or the diaphragm canresult. From time to time the parts may be disassembled andthe screenremoved for clean- When the rinsing operationisfinishedand the valves Iand 2 are closed the valve l9 will instantly close and will trap thewater in the hose A. A vacuum break indicated generally at 3! in thepipe C in Figure 3, permits air to enter the top of the pipe C so thatthe water in the pipe can drain out, When the valves l ancl'2 are turnedonagain for subsequent use of the sprayhead, the water flowing into thepipe C will force the air out through the vacuum break 3|, The water inthe hose A will extend up to the vacuum break 3|. Assoon as the newwater flowing through the pipe-C strikes the Water in the hose A, thewater pressure will be sufficient to open the valve I9 and the water inthe hose will flow out. No 'air has been trapped in the hose andtherefore there will be nosputtering of the water from the spray-headwhich would be the case where the water is mixed with air. -The vacuumbreak 3! is so designed that as soon as the water reaches it, thevntwill be closed automatically and prevent water issuing therefrom.

The spring-pressed valve therefor prevents air from being mixedwithwater in the hose. The expanderin the hose end spreads the-hose. Thehose itself when heated;by the hot water expands and makes a tight fitin the ferrule which will not come apart. The press fit of the diaphragmin the casing makes a'water-tight fit.

The device can be used a s a shower; head and the valve canbe removed ifdesired Thevalves l and 2 are used in connection with a basin 32 shownin-my patent on a Shampoo lavatory, No. 2,194,804, issued March 26,1940. 7

Where the vacuum break 3| is not used in the pipe 0, the spray-headvalve ill willstop a siphoning action under the following conditions. Ifthe water should be shut off on a lower floor and then the valves I and2 opened, the water in the pipe C is prevented from siphoning back intothe plumbing of the building because the valve 1 9 is closed, Thenon-siphon spray head has been designed with two factors in mind: first,to prevent the water in the pipe C from siphoninginto the buildingplumbing when the water is shut off on a lower floor and the valves Iand 2 are opened; and second, to retain water in the hose A when thevacuum break 3| is used. In connection with the first factor, should thesprayhead be in a basin of soiled water and siphoning take place whenthe valves l and 2 were opened, the soiled water would be sucked intothe pipes carrying the fresh water. My valve l9 prevents siphoning andavoids this disadvantage,

Iclaim:

1. In a spray-head, a casing, a water-conveying conduit communicatingtherewith, a perforated diaphragm for the casing, and means for flexingthe diaphragm for directing water flowing therethrough into convergingor diverging streams, said means including a cylindrical perforatedmembena spring-pressed valve slidable in said member, said valve beingadapted to close the conduit when the pressure of the water flowingthrough the conduit drops below a predetermined point.

2. In a device of the type described, a water conveying hose, a sleeveplaced within the end of the hose, a ferrule enclosing-the hoseportionreceiving the sleeve, a perforated thimble adjustably connected to theferrule, a'screen disposed within the thimble'for screening waterpassing from the hose and through the thimble, a spray-head casingcarried by the ferrule, a perforated diaphragm carried by the casing'andconnected to the thimble, whereby an adjustment of the thimble will flexthe diaphragm in the desired direction.

3. In a device of the type described, a water conveying hose, a sleeveplaced within theend of the hose, a ferrule enclosing the hose portionreceiving the sleeve, a perforated thimble 'adjustably' connected to theferrule, a screen disposed'within the thimblefor screening water passingfrom the hose and through the thimble, a spray-head casing carried bythe ferrule, a perforated diaphragm carried by the casing and connectedtothe thimble,=whereb an adjustment of the thimble will flex thediaphragm in the desired direction, the openings in thescreen beingsmaller than the openings in the diaphragni so that any foreign mattersmall enough to pass through the screen openings will pass through thediaphragm openings 4. In a device of the type described, awaterconveying hose,"a sleeve placed within the-eh'd of the hose, a'ferrule'enclosing the h'ose'portl'on receiving the sleeve, a perforatedthimblead- 'justably connected to the ferrule, a screendisposed withinthe thimble for screeningw'ater passing from the 'h'oseand through thethimble, a spray-head casing carried'by the ferrule, a perforateddiaphragm carried by the casing "and connected to the thimble, wherebyan adjustment of 'the'thimble will flex the diaphragn'i in the desireddirection, a spring-pressedvalve in the thimble and adapted to seatagainst the sleeve for holding the water in the hose when the waterpressure dropsbelow a predetermined point.

JAMES N.

